You’ll find on the internet that h.265 takes 10x longer to encode than h.264, but there’s a catch — Everyone’s comparing h.264 encoding times with specialized hardware vs h.265 on pure software.

Intel Quick Sync Video is Intel’s brand for its dedicated video encoding and decoding hardware core. Quick Sync was introduced with the Sandy Bridge CPU microarchitecture on 9 January 2011, and has been found on the die of Intel products ever since. Intel Quick Sync Video - Wikipedia

AMD has something similar,

Video Coding Engine 3.0 (VCE 3.0) technology features a new high-quality video scaling.,[7] and will also support for High Efficiency Video Coding (HEVC, H.265,[8] but As of May 2015, there are no announcements about VP9 video codec support. Video Coding Engine - Wikipedia

Something to note - I think Google’s Video Processor (VP9, VP8, etc) exists because it’s cheaper to develop their own compression format than pay royalties every year (as of 2015 it’s over $5M). It’s not just the $5M either, it’s the fact that the annual royalties can change to any arbitrary amount which would shackle YouTube (Google) into a pretty bad deal.